My Little Hermit crabs are so noisey!

These little guys wake me up all night long! They are nocturnal and move around at night and sleep all day, and at night, I hear them wandering around and hear their shells hit the glass of the aquarium as they go for food and water and hear them digging and even a few times heard them roll off the top of their hut where they sometimes climb nad they roll off and land on other shells I have in there. Who'd a thunk little hermits (and one is really little -dime size!) crabies could be so noisy!